"We have suffered enough. I want the truth for my son, and I know this is not the truth," mother Donna Wittner said.

Wittner said the circumstances surrounding her son's death don't make sense.

Authorities said the Covington youth was visiting a home near Franklinton with a number of teens, when he somehow died of a single gunshot to the back of his head. According to investigators, the shooting was accidental and self-inflicted.

"When you look at all the evidence that we have and statements, it all points to an accidental shooting," Washington Parish Sheriff Robert Crowe said.

"The doctor said it is physically impossible. I mean, if you are grabbing the back, maybe you can get that, but you can't do it," father Dave Wittner said.

The teen's parents are convinced that something is missing from the story, saying that it could not have happened the way investigators said it did and pointed authorities to Internet conversations since the incident on a social network.